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This article in AJ

  1. Vol. 51 No. 10, p. 591-594

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Influence of Magnesium, Potassium, and Nitrogen Nutrition on Phosphoenolpyruvate-Stimulated Carbon Dioxide Fixation1

  1. G. W. Thomas,
  2. N. T. Coleman and
  3. W. A. Jackson



Homogenates from leaves of sweet potato plants grown in solutions low in K, Mg, and N were found to have a reduced capacity to fix CO2 in the presence of phosphoenolpyruvate. Addition of Mg to the assay restored activity to Mg-deficient leaves, but addition of K to extracts from K-deficient leaves did not.

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